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NDC: 503

This is the National Destination Code(NDC):503 page list. Its detail is as below.
Area code 503 is one of the original 86 area codes created by AT&T and the Bell System in 1947. It originally served the entire state of Oregon. In 1995, area code 541 was created as an overlay to area code 503. In 2000, area code 971 was created as an overlay to area code 503. Currently, the largest city it serves is Portland, OR, and it overlaps coverage areas with area code 971.
Prefix State Primary city Usage Carrier
(503) 301- Oregon Portland Wireless Usa Mobility Wireless
(503) 302- Oregon Salem Landline Cellco Partnership DBA Verizon Wireless
(503) 303- Oregon Portland Landline Mcimetro Access Transmission Services LLC
(503) 304- Oregon Salem Landline Qwest Corporation
(503) 305- Oregon Portland Landline Mcimetro Access Transmission Services LLC
(503) 306- Oregon Portland Landline Qwest Corporation
(503) 307- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 308- Oregon Clatskanie Landline Teleport Communications America
(503) 309- Oregon Portland Wireless Sprint Spectrum L.p.
(503) 310- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 312- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 313- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 314- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 315- Oregon Salem Landline Qwest Corporation
(503) 316- Oregon Salem Landline Qwest Corporation
(503) 317- Oregon Portland Wireless T-mobile Usa
(503) 318- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 319- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 320- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 321- Oregon Portland Landline Qwest Corporation
(503) 322- Oregon Bay City Landline United Telephone-northwest-or DBA Centurylink
(503) 323- Oregon Portland Landline Qwest Corporation
(503) 324- Oregon Beaverton Landline Frontier Communications Northwest
(503) 325- Oregon Astoria Landline Qwest Corporation
(503) 326- Oregon Portland Landline Qwest Corporation
(503) 327- Oregon Tigard Landline Teleport Communications America
(503) 328- Oregon Gresham Landline Eschelon Telecomm Of Oregon
(503) 329- Oregon Portland Wireless New Cingular Wireless PCS
(503) 330- Oregon Beaverton Wireless Sprint Spectrum L.p.
(503) 331- Oregon Portland Landline Qwest Corporation
(503) 332- Oregon Beaverton Wireless Sprint Spectrum L.p.
(503) 333- Oregon Portland Wireless New Cingular Wireless PCS
(503) 334- Oregon Portland Landline Pac - West Telecomm
(503) 335- Oregon Portland Landline Qwest Corporation
(503) 336- Oregon Beaverton Landline Comcast Phone Of Oregon
(503) 337- Oregon Estacada Landline Cascade Utilities
(503) 338- Oregon Astoria Landline Qwest Corporation
(503) 339- Oregon Salem Landline Global Crossing Local Services,inc.-or
(503) 340- Oregon Portland Landline Qwest Corporation
(503) 341- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 342- Oregon Portland Landline Global Crossing Local Services,inc.-or
(503) 343- Oregon Portland Landline Global Crossing Local Services,inc.-or
(503) 344- Oregon Portland Landline Global Crossing Local Services,inc.-or
(503) 345- Oregon Cloverdale Landline Global Crossing Local Services,inc.-or
(503) 346- Oregon Portland Landline Qwest Corporation
(503) 347- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 348- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 349- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 350- Oregon Beaverton Landline Frontier Communications Northwest
(503) 351- Oregon Portland Wireless Cellco Partnership DBA Verizon Wireless
(503) 352- Oregon Beaverton Landline Integra Telecom Of Oregon
(503) 353- Oregon Clackamas Landline Qwest Corporation
(503) 354- Oregon Tillamook Landline Level 3 Communications
(503) 355- Oregon Rockaway Landline United Telephone-northwest-or DBA Centurylink
(503) 356- Oregon Beaverton Landline Frontier Communications Northwest
(503) 357- Oregon Forest Grove Landline Frontier Communications Northwest
(503) 358- Oregon Portland Wireless Sprint Spectrum L.p.
(503) 359- Oregon Forest Grove Landline Frontier Communications Northwest
(503) 360- Oregon Portland Landline Neutral Tandem-oregon
(503) 361- Oregon Salem Landline Qwest Corporation
(503) 362- Oregon Salem Landline Qwest Corporation
(503) 363- Oregon Salem Landline Qwest Corporation
(503) 364- Oregon Salem Landline Qwest Corporation
(503) 365- Oregon Salem Landline Qwest Corporation
(503) 366- Oregon St Helens Landline Qwest Corporation
(503) 367- Oregon Portland Wireless New Cingular Wireless PCS
(503) 368- Oregon Nehalem Landline Nehalem Telecomms DBA Nehalem Tel & Tel
(503) 369- Oregon St Helens Wireless New Cingular Wireless PCS
(503) 370- Oregon Salem Landline Qwest Corporation
(503) 371- Oregon Salem Landline Qwest Corporation
(503) 372- Oregon Beaverton Landline Teleport Communications America
(503) 373- Oregon Salem Landline Qwest Corporation
(503) 374- Oregon Tillamook Landline Level 3 Communications
(503) 375- Oregon Salem Landline Qwest Corporation
(503) 376- Oregon Mcminnville Landline Global Crossing Local Services,inc.-or
(503) 377- Oregon Bay City Landline United Telephone-northwest-or DBA Centurylink
(503) 378- Oregon Salem Landline Qwest Corporation
(503) 379- Oregon Mcminnville Landline Level 3 Communications
(503) 380- Oregon Portland Wireless T-mobile Usa
(503) 381- Oregon Portland Wireless Sprint Spectrum L.p.
(503) 382- Oregon Tigard Landline Teleport Communications America
(503) 383- Oregon Salem Landline Teleport Communications America
(503) 384- Oregon Portland Landline Qwest Corporation
(503) 385- Oregon Salem Landline Teleport Communications America
(503) 386- Oregon Astoria Landline Zayo Group
(503) 387- Oregon Tigard Landline Teleport Communications America
(503) 388- Oregon Portland Wireless Cricket Communications
(503) 389- Oregon Tigard Landline Xo Oregon
(503) 390- Oregon Salem Landline Qwest Corporation
(503) 391- Oregon Salem Landline Qwest Corporation
(503) 392- Oregon Cloverdale Landline United Telephone-northwest-or DBA Centurylink
(503) 393- Oregon Salem Landline Qwest Corporation
(503) 394- Oregon Scio Landline Scio Mutual Telephone Association
(503) 395- Oregon Rainier Landline Teleport Communications America
(503) 396- Oregon St Helens Wireless Cellco Partnership DBA Verizon Wireless
(503) 397- Oregon St Helens Landline Qwest Corporation
(503) 398- Oregon Beaver Landline United Telephone-northwest-or DBA Centurylink
(503) 399- Oregon Salem Landline Qwest Corporation
(503) 400- Oregon Salem Landline Radix Networks LLC
(503) 401- Oregon Portland Landline Qwest Corporation